Farmer 400
Fav 700
Fav 900
Power lift / Electrohydraulic control
Rear power lift control system function charts
C
Documents and Diagrams
Fav 900 chassis number 23/3001 and up
25.04.2001
8610
000007
C
b
2/9
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Rear power lift control system function charts
Text-module
1st operational status:
EPC lift
Bullet-List
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Block multiway valve, consisting of AV3 and AV4, is in "EPC" position
●
In this EPC position relevant solenoid switch S048 is open; EPC ECU A005 is therefore active.
●
"Lift" solenoid Y021 of EPC control valve receives power from EPC ECU A005.
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Load line/load-sensing system connection is active when "Lift" valve is active.
●
If LS pump PR is not yet active, current load pressure (= standby pressure of LS pump) is transmitted
as maximum pressure to LS pump as a command via shuttle valves (EPC valve, 1.1 valve, WLS-2,
WLS-1).
●
LS pump PR then goes automatically to pump flow rate and pressure control.
●
Should LS pump already be active elsewhere with higher pressure demand, "surplus" pressure at
EPC valve's pressure governor is limited to power lift load level.
●
Hydraulic oil comes from EPC valve output directly to lift side of power lift cylinders.
●
Displaced oil returns to tank via multiway valve AV4.
